2023

Improving Wireless Power Transfer Efficiency for Distributed Brain Implants using Auto-Tune OVP, V. Leung, A. Lee,... Accepted for Publication, IEEE BioCaS 2024.

An Asynchronous Wireless Network for Capturing Event-Driven Data from Large Populations of Autonomous Sensors

J Lee, AH Lee, V Leung, F Laiwalla, MA Lopez-Gordo, L Larson, .arXiv preprint arXiv:2305.12293

2022

Asynchronous Large-Scale Networks for Spatially Distributed Wireless RF Event Sensors

J Lee, AH Lee, F Laiwalla, V Leung, M Lopez-Gordo, L Larson, .Nature Electronics, in Review

2021

Neural recording and stimulation using wireless networks of microimplants

J Lee, V Leung, AH Lee, J Huang, P Asbeck, PP Mercier, S Shellhammer

Nature Electronics 4 (8), 604-614

Next generation microscale wireless implant system for high-density, multi-areal, closed-loop brain computer interfaces

F Laiwalla, VW Leung, J Lee, P Mercier, P Asbeck, R Rao, L Larson, ...

Brain-Computer Interface Research: A State-of-the-Art Summary 9, 39-51

2020

Wireless ensembles of sub-mm microimplants communicating as a network near 1 GHz in a neural application

J Lee, V Leung, AH Lee, J Huang, P Asbeck, PP Mercier, S Shellhammer, ...

bioRxiv, 2020.09. 11.293829

2019

 A distributed wireless network of implantable sub-mm cortical microstimulators for brain-computer interfaces

F Laiwalla, J Lee, AH Lee, E Mok, V Leung, S Shellhammer, YK Song,  2019 41st Annual International Conference of the IEEE Engineering in Biology

Distributed microscale brain implants with wireless power transfer and Mbps bi-directional networked communications

VW Leung, L Cui, S Alluri, J Lee, J Huang, E Mok, S Shellhammer, R Rao, ...

2019 IEEE Custom Integrated Circuits Conference (CICC), 1-4

An implantable wireless network of distributed microscale sensors for neural applications

J Lee, E Mok, J Huang, L Cui, AH Lee, V Leung, P Mercier, ...

2019 9th International IEEE/EMBS Conference on Neural Engineering (NER), 871-874

Conformal hermetic sealing of wireless microelectronic implantable chiplets by multilayered atomic layer deposition (ALD)

J Jeong, F Laiwalla, J Lee, R Ritasalo, M Pudas, L Larson, V Leung, ...

Advanced Functional Materials 29 (5), 1806440

2018

Wireless power and data link for ensembles of sub-mm scale implantable sensors near 1GHz

J Lee, F Laiwalla, J Jeong, C Kilfoyle, L Larson, A Nurmikko, S Li, S Yu, ...

2018 IEEE Biomedical Circuits and Systems Conference (BioCAS), 1-4

A software-defined radio for wireless brain implants network

H Cai, M Lokhandwala, J Zhu, C Kilfoyle, J Lee, L Larson, A Nurmikko, ...

Proceedings of the 24th annual international conference on mobile computing

Silicon Heterostructure Handbook: Materials, Fabrication, Devices, Circuits and Applications of SiGe and Si Strained-Layer Epitaxy

JD Cressler, S Monfray, G Freeman, D Friedman, DJ Paul, S Tsujino, ...

CRC press

SiGe as an enabler for wireless communications systems

LE Larson, DYC Lie

Circuits and Applications Using Silicon Heterostructure Devices, 33-54

A CMOS distributed sensor system for high-density wireless neural implants for brain-machine interfaces

VW Leung, J Lee, S Li, S Yu, C Kilfovle, L Larson, A Nurmikko, F Laiwalla

ESSCIRC 2018-IEEE 44th European Solid State Circuits Conference 

A background spread-spectrum radio frequency nonlinear parameter measurement technique

AR Wichman, LE Larson

IEEE Transactions on Signal Processing 66 (17), 4516-4526

Temperature sensitivity of non-degenerate modes in CMOS LC quadrature oscillators

M Bagheri, R Bagheri, JF Buckwalter, LE Larson

IEEE Transactions on Circuits and Systems II: Express Briefs 65 (8), 1004-1008

2017

GaInAs/InP composite channel HEMTs for millimeter wave power applications

M Matloubian

International Conference on Millimeter and Submillimeter Waves and …

Background measurement of RF system nonlinearity using spread-spectrum methods

AR Wichman, LE Larson

2017 90th ARFTG Microwave Measurement Symposium (ARFTG), 1-4

2016

A 250 nm GaN N-path filter IC with+ 27 dBm blocker tolerance

CM Thomas, T Quach, I Telliez, T Nakatani, D Kimball, LE Larson

2016 IEEE Compound Semiconductor Integrated Circuit Symposium (CSICS), 1-4

Wireless communication links for brain-machine interface applications

L Larson

Micro-and Nanotechnology Sensors, Systems, and Applications VIII 9836, 128-129

A 1.3 mW 48 MHz 4 channel MIMO baseband receiver with 65 dB harmonic rejection and 48.5 dB spatial signal separation

C Kim, S Joshi, CM Thomas, S Ha, LE Larson, G Cauwenberghs

IEEE Journal of Solid-State Circuits 51 (4), 832-844

Microwave communication links for brain interface applications

L Larson, A Nurmikko

2016 IEEE 16th Topical Meeting on Silicon Monolithic Integrated Circuits in …

2015

Comparative Study of Wireless Transceivers in the Brain

S Sarker, A Nurmikko, L Larson

IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS 9 (5), 1

Tuning-range enhancement through deterministic mode selection in RF quadrature oscillators

M Bagheri, R Bagheri, JF Buckwalter, LE Larson

IEEE Transactions on Microwave Theory and Techniques 63 (11), 3713-3726

Broadband synthetic transmission-line N-path filter design

CM Thomas, LE Larson

IEEE Transactions on Microwave Theory and Techniques 63 (10), 3525-3536

A CMOS 4-channel MIMO baseband receiver with 65dB harmonic rejection over 48MHz and 50dB spatial signal separation over 3MHz at 1.3 mW

C Kim, S Joshi, C Thomas, S Ha, A Akinin, L Larson, G Cauwenberghs

2015 Symposium on VLSI Circuits (VLSI Circuits), C304-C305

RF and microwave technology challenges for Internet-of-Things applications

L Larson

2015 IEEE 15th Topical Meeting on Silicon Monolithic Integrated Circuits in …

A pseudorandom clocking scheme for a CMOS N-path bandpass filter with 10-to-15 dB spurious leakage improvement

CM Thomas, VW Leung, LE Larson

2015 IEEE Radio and Wireless Symposium (RWS), 105-107

A GaN HEMT N-path filter with+ 17 dBm jammer tolerance

CM Thomas, LE Larson

2015 IEEE Radio and Wireless Symposium (RWS), 71-73

2014

Comparative study of ultra-miniature RF coupling structures for intrabody networking applications

S Sarker, A Nurmikko, L Larson

2014 IEEE Biomedical Circuits and Systems Conference (BioCAS) Proceedings …

A BiCMOS 50 MHz input bandwidth, 1-to-16 channelizer optimized for low power analog signal classification

H Li, CM Thomas, G Cauwenberghs, LE Larson

2014 IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), 76-79

A 7.86 mW+ 12.5 dBm in-band IIP3 8-to-320 MHz capacitive harmonic rejection mixer in 65nm CMOS

C Kim, S Ha, C Thomas, S Joshi, J Park, L Larson, G Cauwenberghs

ESSCIRC 2014-40th European Solid State Circuits Conference (ESSCIRC), 227-230

A 65 nm CMOS tunable 0.1-to-1.6 GHz distributed transmission line N-path filter with+ 10 dBm blocker tolerance

CM Thomas, LE Larson

Proceedings of the IEEE 2014 Custom Integrated Circuits Conference, 1-4

Tunable CMOS integrated duplexer with antenna impedance tracking and high isolation in the transmit and receive bands

SH Abdelhalem, PS Gudem, LE Larson

IEEE Transactions on Microwave Theory and Techniques 62 (9), 2092-2104

A CMOS Broadband Distributed -Path Tunable Bandpass Filter

CM Thomas, LE Larson

IEEE microwave and wireless components letters 24 (8), 542-544

Plenary Speaker 2: The next era of wireless communications—Enabling revolutions in health care, transportation, energy, and the environment

L Larson

2014 IEEE Radio Frequency Integrated Circuits Symposium, 7-7

Multi-drive stacked-FET power amplifiers at 90 GHz in 45 nm SOI CMOS

A Agah, JA Jayamon, PM Asbeck, LE Larson, JF Buckwalter

IEEE Journal of Solid-State Circuits 49 (5), 1148-1157

RF and microwave hardware challenges for future radio spectrum access

L Larson

Proceedings of the IEEE 102 (3), 321-333

Wideband envelope tracking power amplifiers for wireless communications

L Larson, D Kimball, P Asbeck

2014 IEEE 14th Topical Meeting on Silicon Monolithic Integrated Circuits in …

Improved envelope injection and termination (EIT) RF power amplifier with envelope equalization for mobile terminal applications

A Kheirkhahi, JJ Yan, PM Asbeck, LE Larson

IEEE Transactions on Microwave Theory and Techniques 62 (2), 341-351